Scratch - Scratch is the programming language & online community where young people create stories, games, & animations.
Ruby on Rails - Ruby on Rails is an open source full-stack web application framework for the Ruby programming...
Blockly - Blockly is a library for building visual programming editors.
ASP.NET - ASP.NET is a free web framework for building great Web sites and Web applications using HTML, CSS and JavaScript.
EduBlocks - Making the Transition from Scratch to Python easier.
Scotty - Scotty is a Haskell framework inspired by Ruby's Sinatra.